package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //处理各种业务异常（地址簿为空，购物车数据为空）
        AddressBook byId = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(byId == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        if(list == null || list.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入一条数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setOrderTime(LocalDateTime.now());//下单时间
        order.setPayStatus(Orders.UN_PAID);//未支付
        order.setStatus(Orders.PENDING_PAYMENT);//待付款
        order.setUserId(userId);
        order.setNumber(String.valueOf(System.currentTimeMillis()));//订单号用当前时间戳，并转成字符串
        order.setPhone(byId.getPhone());//手机号
        order.setConsignee(byId.getConsignee());//收货人
        orderMapper.insert(order);
        //向订单明细表插入n条数据
        List<OrderDetail> orderDetails = new ArrayList<>();
        for(ShoppingCart cart : list){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());//订单表的主键id（OrderMapper里面设置了主键返回）
            orderDetails.add(orderDetail);
        }
        //批量插入订单明细表（先设置list集合，每遍历一次就放进list集合一次，最后把这个集合批量插入）
        orderDetailMapper.insertBatch(orderDetails);
        //清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO返回结果
        OrderSubmitVO build = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
        return build;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus= Orders.PAID;//已支付
        Integer OrderStatus= Orders.TO_BE_CONFIRMED;//待接单

        //发现没有将支付时间check_out属性赋值，所以在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();
        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();
        orderMapper.updateStatus(orderNumber,OrderPaidStatus,OrderStatus,check_out_time);
        // 通过WebSocket向客户端推送消息
        Map map = new HashMap();

        map.put("content", "订单号："+ordersPaymentDTO.getOrderNumber());
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());

        map.put("type", 1);//1表示来单提醒 2表示客户催单
        map.put("orderId", ordersDB.getId());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
//        // 通过WebSocket向客户端推送消息
//        Map map = new HashMap();
//        map.put("type", 1);//1表示来单提醒 2表示客户催单
//        map.put("orderId", ordersDB.getId());
//        map.put("content", "订单号："+outTradeNo);
//
//        String json = JSON.toJSONString(map);
//        webSocketServer.sendToAllClient(json);
    }

    @Override
    public PageResult historyOrders(Integer page, Integer pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> pages = orderMapper.pageQuery(ordersPageQueryDTO);//找到当前这个人和这个订单状态的所有订单
        List<OrderVO> orderVOList = new ArrayList<>();
        if(pages!=null && pages.size()>0){
            for(Orders orders : pages){
                Long id = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);//查询订单明细
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);//OrderVO是Orders的子类，所以可以这样赋值
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(pages.getTotal(),orderVOList);
    }

    //查询订单详情
    @Override
    public OrderVO orderDetail(Long id) {
        OrderVO orderVO = new OrderVO();
        Orders orders = orderMapper.getById(id);//根据id查询订单数
        //设置下单用户和电话
        orders.setUserId(BaseContext.getCurrentId());
        //根据id查询地址数据（这样就可以获得收货人的信息了，不需要重新找配送人名字和电话是什么了）
        AddressBook byId = addressBookMapper.getById(orders.getAddressBookId());
        BeanUtils.copyProperties(byId,orders);

        //设置配送地址（而配送地址在AddressBook这个类里面没有一模一样的字段，必须要拼接）
        Long addressBookId = orders.getAddressBookId();
        String address = getAddrass(addressBookId);
        orders.setAddress(address);
        log.info("订单数据：{}",orders);

        BeanUtils.copyProperties(orders,orderVO);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);//根据订单id查询订单明细
        orderVO.setOrderDetailList(orderDetailList);
        log.info("订单详情数据：{}",orderVO);
        return orderVO;
    }
    //取消订单
    @Override
    public void cancel(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    //再来一单（将当前订单重新加入购物车里面）
    @Override
    public void repetition(Long id) {
        log.info("再来一单，订单id：{}",id);
        //查询订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        log.info("订单详情：{}",orderDetailList);
        //将订单详情转换成购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart);
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        log.info("购物车数据：{}",shoppingCartList);
        shoppingCartMapper.insertBatch(shoppingCartList);//将购物车对象添加到数据库
    }
    //获取订单配送地址
    private String getAddrass(Long addressBookId){
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        String address = addressBook.getProvinceName() + addressBook.getCityName() +
                addressBook.getDistrictName() + addressBook.getDetail();
        return address;
    }
    //订单搜索
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                //获得手机号
                String phone = addressBookMapper.getPhone(orders.getUserId());
                String userName = addressBookMapper.getConsignee(orders.getUserId());
                String address = addressBookMapper.getById(orders.getAddressBookId()).getDetail();
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVO.setPhone(phone);
                orderVO.setAddress(address);
                orderVO.setConsignee(userName);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
    //各个状态的订单数量统计
    @Override
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);//待接单
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);//待派单
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);//派单中
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }
    //拒单
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
//        - 商家拒单其实就是将订单状态修改为“已取消”
//        - 只有订单处于“待接单”状态时可以执行拒单操作
//        - 商家拒单时需要指定拒单原因
//        - 商家拒单时，如果用户已经完成了支付，需要为用户退款
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            log.info("申请退款");
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .status(Orders.CANCELLED)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

    }
    //取消订单
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款：{}");
        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    //派送订单
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }
    //完成订单
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
    //客户催单
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map=new HashMap();
        map.put("type", 2); //1来单提醒 2客户催单
        map.put("orderId",id);
        map.put("content","订单号："+ordersDB.getNumber());
        String json=JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }
}














